/**
 * Created by jiachenpan on 16/11/18.
 */

// 是否是数字
export function isNumber(val) {
  if (!val) return false
  val = val.trim()
  if (val === '') {
    return false
  }
  if (!isNaN(val)) {
    return true
  } else {
    return false
  }
}
// 是否价格格式：数字+小数点
export function isPrice(val) {
  if (!val) return false
  val = val.trim()
  if (val === '') {
    return false
  }
  const regPrice = /(^[1-9]\d*(\.\d{1,2})?$)|(^0(\.\d{1,2})?$)/
  if (regPrice.test(val)) {
    return true
  } else {
    return false
  }
}

// 是否hex格式的颜色
export function isHexColor(color) {
  if (!color) return false
  color = color.trim()
  const regHex = /^#([0-9a-fA-F\d]{6}|[0-9a-fA-F\d]{3})$/
  if (regHex.test(color)) {
    return true
  }
  return false
}

// 格式化数字
export function formatNumber(n) {
  const str = n.toString()
  return str[1] ? str : `0${str}`
}

export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if (('' + time).length === 10) time = parseInt(time) * 1000
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

export function formatTimeToDate(time, pattern) {
  // 时间格式化函数，此处仅针对yyyy-MM-dd hh:mm:ss 的格式进行格式化
  var date = new Date(time)
  var year = date.getFullYear()
  /* 在日期格式中，月份是从0开始的，因此要加0
	 * 使用三元表达式在小于10的前面加0，以达到格式统一  如 09:11:05
	 * */
  var month = date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1
  var day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()
  var hours = date.getHours() < 10 ? '0' + date.getHours() : date.getHours()
  var minutes = date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()
  var seconds = date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds()
  // 拼接
  let format = ''
  switch (pattern) {
    case 'yyyy-MM':
      format = year + '-' + month
      break
    case 'yyyy-MM-dd':
      format = year + '-' + month + '-' + day
      break
    case 'yyyy-MM-dd hh:mm:ss':
      format = year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds
      break
    case 'yyyy/MM':
      format = year + '/' + month
      break
    case 'yyyy/MM/dd':
      format = year + '/' + month + '/' + day
      break
    default:
      break
  }
  return format
}
// 格式化时间
export function formatTime(time, option) {
  time = +time * 1000
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) { // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return d.getMonth() + 1 + '月' + d.getDate() + '日' + d.getHours() + '时' + d.getMinutes() + '分'
  }
}

/**
 *get getDay
 * @param {Number} daysAgo input value 几天前
 * @returns {String} output value
 */
export function getDate(daysAgo) {
  const today = new Date()
  const allSeconds = today.getTime() + 1000 * 60 * 60 * 24 * daysAgo
  today.setTime(allSeconds)
  var tYear = today.getFullYear()
  var tMonth = today.getMonth()
  var tDate = today.getDate()
  tMonth = tMonth + 1 < 10 ? '0' + (tMonth + 1) : tMonth + 1
  tDate = tDate < 10 ? '0' + tDate : tDate
  return tYear + '-' + tMonth + '-' + tDate
}

/**
 *get getByteLen
 * @param {Sting} val input value
 * @returns {number} output value
 */
export function getByteLen(val) {
  let len = 0
  for (let i = 0; i < val.length; i++) {
    if (val[i].match(/[^\x00-\xff]/ig) != null) {
      len += 1
    } else {
      len += 0.5
    }
  }
  return Math.floor(len)
}

export function cleanArray(actual) {
  const newArray = []
  for (let i = 0; i < actual.length; i++) {
    if (actual[i]) {
      newArray.push(actual[i])
    }
  }
  return newArray
}

// Url参数 转 obj
export function getQueryObject(url) {
  url = url == null ? window.location.href : url
  const search = url.substring(url.lastIndexOf('?') + 1)
  const obj = {}
  const reg = /([^?&=]+)=([^?&=]*)/g
  search.replace(reg, (rs, $1, $2) => {
    const name = decodeURIComponent($1)
    let val = decodeURIComponent($2)
    val = String(val)
    obj[name] = val
    return rs
  })
  return obj
}

// json 转 Url参数
export function param(json) {
  if (!json) return ''
  return cleanArray(Object.keys(json).map(key => {
    if (json[key] === undefined) return ''
    return encodeURIComponent(key) + '=' +
			encodeURIComponent(json[key])
  })).join('&')
}

// Url参数 转 json
export function param2Obj(url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse('{"' + decodeURIComponent(search).replace(/"/g, '\\"').replace(/&/g, '","').replace(/=/g, '":"') +
		'"}')
}

export function html2Text(val) {
  const div = document.createElement('div')
  div.innerHTML = val
  return div.textContent || div.innerText
}

export function objectMerge(target, source) {
  /* Merges two  objects,
	   giving the last one precedence */

  if (typeof target !== 'object') {
    target = {}
  }
  if (Array.isArray(source)) {
    return source.slice()
  }
  Object.keys(source).forEach((property) => {
    const sourceProperty = source[property]
    if (typeof sourceProperty === 'object') {
      target[property] = objectMerge(target[property], sourceProperty)
    } else {
      target[property] = sourceProperty
    }
  })
  return target
}

export function scrollTo(element, to, duration) {
  if (duration <= 0) return
  const difference = to - element.scrollTop
  const perTick = difference / duration * 10
  setTimeout(() => {
    element.scrollTop = element.scrollTop + perTick
    if (element.scrollTop === to) return
    scrollTo(element, to, duration - 10)
  }, 10)
}

export function toggleClass(element, className) {
  if (!element || !className) {
    return
  }
  let classString = element.className
  const nameIndex = classString.indexOf(className)
  if (nameIndex === -1) {
    classString += '' + className
  } else {
    classString = classString.substr(0, nameIndex) + classString.substr(nameIndex + className.length)
  }
  element.className = classString
}

export const pickerOptions = [{
  text: '今天',
  onClick(picker) {
    const end = new Date()
    const start = new Date(new Date().toDateString())
    end.setTime(start.getTime())
    picker.$emit('pick', [start, end])
  }
}, {
  text: '最近一周',
  onClick(picker) {
    const end = new Date(new Date().toDateString())
    const start = new Date()
    start.setTime(end.getTime() - 3600 * 1000 * 24 * 7)
    picker.$emit('pick', [start, end])
  }
}, {
  text: '最近一个月',
  onClick(picker) {
    const end = new Date(new Date().toDateString())
    const start = new Date()
    start.setTime(start.getTime() - 3600 * 1000 * 24 * 30)
    picker.$emit('pick', [start, end])
  }
}, {
  text: '最近三个月',
  onClick(picker) {
    const end = new Date(new Date().toDateString())
    const start = new Date()
    start.setTime(start.getTime() - 3600 * 1000 * 24 * 90)
    picker.$emit('pick', [start, end])
  }
}]

export function getTime(type) {
  if (type === 'start') {
    return new Date().getTime() - 3600 * 1000 * 24 * 90
  } else {
    return new Date(new Date().toDateString())
  }
}

/**
 * @desc 函数防抖
 * @param func 目标函数
 * @param wait 延迟执行毫秒数
 * @param immediate true - 立即执行， false - 延迟执行
 */
export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function() {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp

    // 上次被包装函数被调用时间间隔last小于设定时间间隔wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function(...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}

/**
 * object对象深拷贝
 * @param {source} 原对象
 * @returns 目标对象
 */
export function deepClone(source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'shallowClone')
  }
  const targetObj = source.constructor === Array ? [] : {}
  Object.keys(source).forEach((keys) => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = source[keys].constructor === Array ? [] : {}
      targetObj[keys] = deepClone(source[keys])
    } else {
      targetObj[keys] = source[keys]
    }
  })
  return targetObj
}

// 是否是json字符串
export function isJsonString(str) {
  if (!str) return false
  try {
    if (typeof JSON.parse(str) === 'object') {
      return true
    }
  } catch (e) {
    return false
  }
  return false
}

// 去掉头尾部的字符x
export function trimStr(str, char) {
  if (!str || !char) return str
  // 去掉左右空白
  str = str.trim()
  if (str.length > char.length) {
    // 左边
    let strLeft = str.substring(0, char.length)
    strLeft = strLeft.replace(new RegExp(char, 'g'), '')
    // 中间不替换部分
    const strMid = str.substring(char.length, str.length - char.length)
    // 右边
    let strRight = str.substring(str.length - char.length, str.length)
    strRight = strRight.replace(new RegExp(char, 'g'), '')
    str = strLeft + strMid + strRight
  }
  return str
}

/**
 *对象转数组
 * @param {obj} 原始对象
 * @param {colArr} 字段名称数组 ['label', 'value']
 * @returns 数组
 */
export function objToArr(obj, colArr) {
  const arr = []
  const _a = colArr[0]
  const _b = colArr[1]
  Object.keys(obj).forEach(function(key) {
    const _obj = {}
    _obj[_a] = obj[key]
    _obj[_b] = key
    arr.push(_obj)
  })
  return arr
}

/**
 *控制字符串长度，支持中英字符串
 * @param {str} 字符串
 * @param {n} 长度
 * @returns 长度为n的字符串
 */
export function getStrByLength(str, n) {
  if (str) {
    const r = /[^\x00-\xff]/g
    if (str.replace(r, 'mm').length <= n) {
      return str
    }
    const m = Math.floor(n / 2)
    for (let i = m; i < str.length; i++) {
      if (str.substr(0, i).replace(r, 'mm').length >= n) {
        return str.substr(0, i) + '...'
      }
    }
  }
  return str
}

/**
 * 生成笛卡尔积
 * @param 原数组
 * @returns 笛卡尔积数组
 */
export function descartes(array) {
  if (array.length < 2) return array[0] || []
  return [].reduce.call(array, function(col, set) {
    const res = []
    col.forEach(function(c) {
      set.forEach(function(s) {
        const t = [].concat(Array.isArray(c) ? c : [c])
        t.push(s)
        res.push(t)
      })
    })
    return res
  })
}

/**
 * 是否存在
 */
export function isExist(exp) {
  if (typeof (exp) !== 'undefined' && exp !== null && exp !== '') {
    return true
  } else {
    return false
  }
}
// 表单重置
export function resetForm(refName) {
  if (this.$refs[refName]) {
    this.$refs[refName].resetFields()
    this.$nextTick(function() {
      this.$refs[refName].clearValidate()
    })
  }
}
// 默认输出方法
export default {
  isNumber,
  formatTime,
  trimStr,
  getStrByLength,
  deepClone,
  objectMerge,
  objToArr,
  isJsonString,
  descartes,
  isExist,
  formatTimeToDate,
  isHexColor,
  getDate,
  debounce,
  resetForm,
  isPrice
}
